Al-Anon ?
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Stevie's suggestion about Al-Anon literature is spot on, IMHO.
Here's a little of our family's experience with AA's sister fellowship:
Ten years ago, I gave some Al-Anon literature to my sister-in-law.
She still reads it and goes to a meeting once a week.
It can be a good way for non-alcoholic family members to understand their alcoholic loved ones -- be they sober, or not.
I asked her which literature would be most appropriate for parents.
She’s going to a parent focused meeting tonight.
She says it really helps her, even though it's not her children who are alcoholic.
Hopefully she'll tell me which book(s) are best.
My wife went to a couple of meetings.
It wasn’t for her.
She only stayed long enough to learn that I was doing the right thing.
But, she went back to introduce her friend to the programme.
My mother went when she accepted the fact that her husband was an alcoholic/addict.
It helped her through a very difficult marriage and an unpleasant divorce.
I have been to one Al-Anon meeting as a guest speaker.
Some of the experiences they shared were truly inspiring.
Some were sad.
Although I do qualify as an Al-Anon member, AA is the place for me.
Sounds like your parents may not be open to suggestion, Unstable.
But, if they read (with an open mind?) any literature you were to give them, it just might help your family.
In our experience: Alcoholism is definitely a family illness.